Fan guard



Oct. 26 1926. 1,604,178

w. H. LAWRENCE FAN GUARD Filed Novv 27 1925 W R v Patented Oct. 26, 192.6.

UNITED STATES PATENT OFFIOE.

WELL-SLEY I-I. LAWRENCE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO PARKER W'IRE GOODS CO. OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.

FAN GUARD.

Application fi1ed November 27, 1925.

This invention relates to a fan guard for use 011 electrical ventilating fans, such guards being commonly made with a plurality of radial or substantially radial wire spokes.

My invention relates particularly to the means provided for securing the inner ends of these spokes in position, and it is the object of my invention to provide an improved construction for this purpose by which the inner ends of the spokes will be very firmly held from displacement, while at the same time the construction is economical to manufacture and is of a pleasing appearance.

My invention further relates to certain arrangements and combinations of parts which will be hereinafter described and more articularly pointed out in the appended claims.

The preferred 'form of the invention is shown in the drawings, in which Fig. 1 is a partial front view of my improved fan guard;

Fig. 2 is a rear view of the center plate or disc;

Fig. 3 is a view similar to Fig. 2 but showing the ends of the spokes assembled and secured in the center plate;

Fig. & is a detail sectional view taken along the line H in Fig. 2;

Fig. 5 is a view similar to Fig. 4:, but showing the endof a spoke assembled with the center plate;

Fig. 6 is a view similar to Fig. 5 but showing the spoke secured in position; and

Figs. 7 and 8 are detail sectional views taken along the lines 7-7 and 88 in Fig. 6.

Referring to the drawings, I have shown a portion of a fan guard comprising one or more outer rings 10, a center plate 11 and a plurality of substantially radial spokes 12. The ring 10 and spokes 12 are commonly formed of relatively heavy wire, and the spokes 12 may be given a curved outline for ornamental purposes if desired.

The center plate 11 comprises aperipheral edge portion 15 and a center portion 16. A circular series of openings 17 are provided in the center portion 16 and a series of substantially radial depressions 18 extend out- Serial No. 71,623.

ward from the opening 17 to the inner edge of the peripheral flange 15.

The spokes 12 are ofiset at their inner ends, as indicated at 20 in Fig. 5, these ends 20 being adapted to extend through the openings 17 in the center portion 16. After the spokes are thus assembled with the con ter plate, the ends 20 of the spokes 12 are headed or upset as indicated in Fig. 6, to prevent withdrawal or displacement of the spokes.

At the same time, or by a subsequent operation, the extreme inner part of the de pressed portion 18 is swedged toward the center of the plate, as also indicated in Fig. 6, forcing a portion of the metal 23 against the upset end 20 of the spoke and also forcing another portion of metal 24: into the radial portion of the spoke. The end of the spoke 12 is thus very firmly secured in the plate 20, and is held from displacement longitudinally or from angular movement about the upset end 20.

It will be noted that the flange portion 15 is positioned in a plane at the rear of the spokes 12 and that it forms a continuous sur face surrounding the depressions 18.

Having thus described my invention and.

the advantages thereof, I do not wish to be limited to the details herein disclosed, but what I claim is 1. In a fan guard, a plurality of substan tially radial spokes having ofiset end portions,'and a disc having depressions to receive portions of said spokes and having openings to receive said end portions, said end portions being upset at the rear face of said disc.

2. In a fan guard, a plurality of substantially radial spokes having offset end portions, and a disc having depressions to receive portions of said spokes and having openings to receive said end portions, said end portions being upset at the rear face of said disc, and an inner end portion of the depressed stock of said disc being swedged against said upset end portion of each spoke.

3. In a fan guard, a plurality of substantially radial spokes having ofiset end portions, and a disc having substantially radial depressions to receive said spokes and having openings to receive said end portions, said end portions being upset at the rear face of said disc, and said disc having also a peripheral edge portion extending continuously behind said spokes at the outer ends of said radial depressions.

4c. In a fan guard, a center plate co1nprising a center portion having a circular series of openings therethrough, and a series of depressions leading outwardly therefrom to the outer edge of said center portion, and said plate having also a continuous peripheral edge portion positioned in a plane rearward of said center portion.

In testimony whereof I have hereunto atfixed my signature.

WELLSLEY H. LAIVRENCE. 

